<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .box{
            font-size: 16px;
            border: solid 1px #ddd;
            width: 300px;
            padding: 10px;
            margin-bottom: 2rem;
        }
        .normal{
            word-spacing: normal;
        }
        .length{
            word-spacing: 20px;
        }
         .length2{
            word-spacing: -5px;
        }
    </style>
</head>
<body>
    <h1>word-spacing</h1>
    <h2>normal</h2>
    <div class="box normal">
        how are you
    </div>

    <h2>length 20px</h2>
    <div class="box length">
         how are you
    </div>

    <h2>length -5px</h2>
    <div class="box length2">
        how are you
    </div>
</body>
</html>